JPS62125366U

JPS62125366U -

Info

Publication number: JPS62125366U
Application number: JP1163786U
Authority: JP
Priority date: 1986-01-31
Filing date: 1986-01-31
Publication date: 1987-08-08

Description

[Brief explanation of the drawing]

図面は本考案の実施例が示され、第１図は直流
モータの第１実施例断面平面図、第２図は第１図
の電機子鉄芯リブを通る磁束波形図、第３図は逆
起電圧波形図、第４図は電流波形図、第５図はト
ルク波形図、第６図は第２実施例の断面平面図、
第７図は第６図の電機子鉄芯リブを通る磁束波形
図、第８図は逆起電圧波形図、第９図はコギング
波形図、第１０図は３極合成コギング波形図、第
１１図は第６図の変形例の断面平面図、第１２図
は第３実施例の断面平面図、第１３図は第１２図
の電機子鉄芯リブを通る磁束波形図、第１４図は
従来の直流モータの断面平面図である。１…ケース、１ａ…内周面、１ｂ，１ｄ…円弧
面、２…マグネツト、４…電機子コイル、５…電
機子鉄芯。 The drawings show embodiments of the present invention; Fig. 1 is a cross-sectional plan view of the first embodiment of a DC motor, Fig. 2 is a diagram of the magnetic flux waveform passing through the armature core rib of Fig. 1, and Fig. 3 is a reverse diagram. FIG. 4 is a current waveform diagram, FIG. 5 is a torque waveform diagram, and FIG. 6 is a cross-sectional plan view of the second embodiment.
Figure 7 is a magnetic flux waveform diagram passing through the armature iron core rib in Figure 6, Figure 8 is a back electromotive voltage waveform diagram, Figure 9 is a cogging waveform diagram, Figure 10 is a three-pole composite cogging waveform diagram, and Figure 11 is a diagram of the cogging waveform. The figure is a cross-sectional plan view of a modified example of FIG. 6, FIG. 12 is a cross-sectional plan view of the third embodiment, FIG. 13 is a magnetic flux waveform diagram passing through the armature core rib of FIG. 12, and FIG. 14 is a conventional FIG. 3 is a cross-sectional plan view of the DC motor of FIG. DESCRIPTION OF SYMBOLS 1...Case, 1a...Inner peripheral surface, 1b, 1d...Circular surface, 2...Magnet, 4...Armature coil, 5...Armature iron core.

Claims

[Scope of utility model registration request]

In a motor having an armature core around which an armature coil is wound, a magnet located on the outer periphery of the armature core, and a case, the inner circumferential surface of the case has a diameter larger than the outer circumferential diameter of the armature core. A DC motor has at least two arcuate surfaces formed therein, and a flexible magnet of uniform thickness is closely fixed to the arcuate surfaces.